Xsaw-gummer



(N0 Model.j

J. B BAIRD & J. HOLLORAN. SAW GUMMER.

N0. 452,157. Patented May 12, 1891.

ll/lllllllll/l/ mr Masxsws.

UNIT-ED STATES PATENT FFICE.

JAMES B. BAIRD AND JOHN HOLLORAN, OF NOBLESVILLE, INDIANA.

' SAW-GUMMER.

SPECIFIGATION forming part of Letters Patent) N0. 452,157, dated Man? 12, 1891.

Applica.tion filecl J'anuary 30 189L Serial N0. 379,657. (N0 morle1.)

Be i knwn that we, JAMES B. BAIRD IULI JOHN HOLLORAN, citizens of the United States, residing ab Noblesville, in the county of Hamilton and State f Indiana, have invented 0ertain new an us eful Improvements in S&w- Gummers, of Which the following is a speeificati0n.

Our said.inVention relates t0 thab dass 0f saw-gurnmers which ar s ecured directly upon the saw-blade, and in which the cutting-tool is tapered and arranged to advance trans versely of the saw-lolade as the operation of cutting prognesses, thus bringing continually a largei portion of said cutting-tool into operation.

Itconsists in certain details offi-eonstruction, whereby the 13001 is enabled tb be more expeditiously removed 01 replaeed, an(l also whereby it is supportecl with great timnness and steadiness while in operation, as will be hereinafte1 m01e particularly describecl and elairned.

Referring t0 the aceompanying drawings, whieh are macle a part hereof, and 011 wl1ieh similar letters of referenee inclicate similar parts, Figure 1 is a perspective view of a fragment 0f saw With 0m improved gummer attaehed thereto; Fig. 2, a transverse sectional view alongside fl18 fragment of saw-blade; Fig. 3, a longitudinal sectional view showing tl1e too1 in elevation; Fig. 4, a transverse secuional view looking toward tl1e righb fron1 tl1e clottecl line 4 4 in Fig. 3, and ShQWing an elevation o f tl1e inner end. of the elamping-nut, and Fig. 5 a similar sectional view 0n the doted line 5 5.

In said. drawings, ehe portions marked A represent a fragment of saw-blade; B, the n1ain easting 01 frame 0f 0nr improved glim- 1ner; C, the eutting-tool; D, the serew-shaft by which said cool is driven, and. E the damping-nut whieh engages Wih said screw-shaft.

The fragment of saw A is of course only shown for purposes of illustration, and needs no specia;l description.

[Ehe casting 01 frame-work Bis only peeuli-ar in mino1 details. It has two barrels B B extencling out in opposite directions from its central portion, and that barrel B which incloses the screw-shaft is entirely closecl, so

filmt clirt is effectually exclucled, while tlmt barrel 13 in whiel1 the cutting-tool rravels is open 011 its lower side, thus permitting the ready egress of die ehips which are formed by said tool in gunnning tl1e saw. An enlarged portion npon the end 0f the bamrel B, having a cap B, contains the clamping-nut -f0r the screw-shafo, as Will be presently described. Tw0 heavy clamping-screws b b are :providecl, by wl1ich the gummer may be clamped rigidly upon the saw.

The cutting-tool C, as shown in Fig. 3, is tapered and grows gradnally larger froxn its poinn to its l1eel. It is provided ab tl1e ends -With supporting-collars 0 d, whieh fit elosely in the barrels of the n1ain casting 01 frame, and

said cutting-Lool is thereby rigidly supported. The;collar c may b'e mountecl loos'ely npon theforwardly-projeetiiag Stern 0n tl1e cuttingtool; lont the rear collar d is commonly 01 preferably formed integrlly With the serewshaft, and thus forms also tl1e socket 011 said screw-shaft, into which the rearwardly-projecting stem 011 the cntting-tool is inserted, and t 0 which it is securecl, preferably by a set-screw, as shown.

The screw-shaft D carries the cutting-tool, having a soeket d therefor, as just describecl, and, prefembly, a set-screw d by which a, rigid union is effeeted. \Vhen it is tnrne, i1: no' only turns the cutting-tool, bat forces it forwarcl at tl1e same time, thus continnally bringii1g a larger and langer portion of Said entting-tool into operation, as Will be re3adily understood. This feature, howeveris not of our inventi0n. Any ordinary erank D may l0e seeuned to tl1e end of this shaft, by whieh it may be turnecl.

The clamping-screw E is eomposed of two parts placed in a chamber in the outer end of the' barrel B 0f tl1e main frame 01 casting, ancl its onter snrface is eccentrie in formation, 'as is also t-he interior surface of said chamber. Pins 01 thn'mb-pieces E extencl through slots in a circumferential wall 0f said ehamber t0 Ehe outside, so tl1at ehe two halves of said nut may be manipulatecl wit-hout openin g the chamber, whieh is generally closed by a cap B seeured in place by screws b A snitable spring e is snitably eonnected 1:0 the halves of the nut, preferably by being insorted in a groove cut in 0110 end theroof, and serves to throw the halves of tho nut apart; when turned t0 the position which permits it. Vhen turned t0 this positionthe screw-shaft may be passed free1y through the nut, and it and the cutting-tool 1nay be withdrawn a1t0- gether froxn the 1nachin@ 0r returned t0 p0sL tion for a new operation without disturbing any other part. \Vhen however, the nut is turned in the other direction, the two ha1ves will be c1osed in against the serew-shaft, and said screw-shaft then runs therein in the same 1nanner that it would if this were a solid nut. Tl1e operator, therefore, only has t0 turn the halves of tlxis nut in 0ne direction 0r the ot-her by means 0f the projecting pins 01 thumb-pieces E in order to insure tl1at tb0 screw-shafb sha1l be held by 0r released therefron1.

Having thus fully described our said invention, what we c1ai1n as new, and d0sire t0 SG- cure by Letters Patent, is-- l. The cornbination, in a saw-gnrnmer, of Lhe main fra1ne 01 casting having barrels in which the cuttin g-t001 is p1aced, and said 011 tting-tool provided With collars 0r enlarged portions ab both ends which fit;closely Within said barrels, whereby said cutting-tool is rigidly supported, substantially as set forth.

2. The eornbination, in a saw-gumrner, of the main frame or cast-ing, the cutting-tool, a screw-shaft f01 driving said eutting-tool, a chaxnber in the 1ran1e having an interior carn for1nation, and a nut composed of two parts and similarly formed and therebyadapted t0 c1amp o1 release said screw-shaft, substantia1ly as set forth.

3. The combination, in a saw-gu1nmer, of 1;110 main frame or casting, the cutting-tool, a screw-shaft; f0r driving said cutting-too], a cam-chamber in the fraxne surrounding said screw-shaft, a parted nut located within said charnber, a cam formation 011 the exterior, and pins 01 thumb-pieces extending through slots, whereby it 1nay be operated, substantial1y as sei; forth.

1L. The cornbination, in a saw-gunnner, 0f the 1nain frame or cast-ing, tho cutting-tool, a Screw-shaft for driving said cutting-tool, a cam-chambcr in the frame surronnding said screwshaft, a parted nut located within said chan1ber, a cam forrnation 011 the extorior, pins or t-humb-pieces extending through slots, whereby it may be operated, and a spring adapted to cngage with and separate the ha1ves of Lhe nnt when released.

The combination, in a saw-gunnner, 0f a 1nain frarne 0r casting havingbarrels in which the cutting-tool and its driving-shafl; are placed, and said cutting-tool and shaft, that bearing into which the cutting-tool travels as tl1e gum ming progresses having an openin g or slit through its side through which the Chips formed by the cool in Operation are discharged, substantiallyas sei; forth.

In witness whereof we have hereunto Set our hands and seals, at Indianapolis Indiana, (bis th day 0f Januar-y, A. D. 1891.

.TAS. B. BAIRD. JOHN IIOLLORAN.

\Vitnessesz CI-IESTER BRADFORD, E. W. BRADFORD. 

